Boot for hot-air stacks



Sept. '21 1925. f 1,600,739

A. G. SCHERER BOOT FOR HOT AIR STACKS Filed Jan. v, 1926 74 7 i 2 L. I 6 W I mfi m (5% R.

Patented ept. 21, 192%.

FiiC E.

ALBERT G. SCI-IERER, OF CI-IIGAGO, ILLINOIS, ASSIGNOR TO EXCELSIOR STEEL FURNACE COIVIPANY, OF CHICAGO, ILLINOIS, A CORPORATION: OF ILLINOES.

BOOT FOR HOT-AIR STACKS.

Application filed January My present invention relates to improvements in boots for hot air stacks, and has special reference to the provision of means for drawing such boots with such degree of force as may be necessary into the desired relation with the hot air stack and the joists and studding of buildings with which they are designed to be assembled, and after they are so drawn into position to securely and dependably anchor or secure them in lace. p Hot air stacks consist of sheet metal conduits of rectangular crosssection installed between the studding of buildings for the purpose of conveying hot air from the furnace to the portions of the building which it is desired to heat. The hot air is uniformly conveyed from the furnace to the bottom of the stacks in or by means-of round pipe, and the fitting by means of which assembly is made between the round pipe from the furnace and the rectangular stack between the studdingis called a boot. There is little room behind the boot or between the sides of the boot and the joists for manipulation. The present practice is to rivet straps of tin to the top of the boot and insert it between the joists and press it up by hand as carefully as may be until it is believedthat satisfactory. assembly has been secured between the boot and the stack, and then the straps are nailed to the joists to secure or anchor the boot in position. Because of lack of room between the sides of the boot and the joists it is difficult.

to properly nail the holding straps in position and it is diiiicult to pressthe boot up into proper assembly with the stack with only the force of the hands and arms operating against the bottom of the boot, and the boot does not always stay in position while the straps are being nailed to the joists. Means are usually provided upon the stack and boot for securing an interlocking assembly between them and in order to cause this means to function suflicient, controlled, uniform pressure must be applied to the boot. 7 It has therefore been my object to provide simple means in connection with boots for hot air stacks by means of which they may be drawn with any de gree of force which is necessary into'pes'i tion between the joists and into 7, 1926. Serial No. 79,746.

with the hot air stacks and which will secure them dependably and permanently in ture shown in Fig. 1, the joists, floor and a studs being shown in section, and an elbow in the round pipe from the furnace being shown in assembly with the boot;

Fig. 3 is a similar view to that shown in Fig. 2 except that the parts are in completely assembled position.

Similar reference characters refer to similar parts throughout the several views.

I have illustrated a typical boot construction. In Figs. 1, 2, 3 the assembly with the round pipe from the furnace is made from the bottom of the boot and the boot consists of rectangularly arranged rear and side walls 6 and 7.- The front edge of the side walls extends rearwardly from the lower front corner to a suflicient distance in front of the top rear corner to'arrange for assembly with the hot air stack. The front wall 8 joins with the slanting portion of the side wall 7 and the lower edges of the front, rear and side walls are connected by a bottom plate provided with a circular aperture to which is secured a collar 9 for receiving elbow 10 of the cylindrical pipe running from the furnace. The upper edges of the rear, front and side walls are bent to provide shoulders, as at 11, and then extend upwardly, as at 12, to telescope or slip within the walls of the rectangular stack 13. preferably provided with an outwardly eX- tending angular bead 14 adapted to be forced within a restriction 15 in the stack so as to lock the stack and boot together. The forcing of these parts together requires the firm and regulated application of the parts one to the other.

diametrically opposite locations two arallel The upward extensions 12 are 1 provide on the sides of the collar 9 at I the slots out as at 17 so as to permit of the introduction of a wire 18 therethrough. For the utilizing of these wires all that it is necessary to do is to nail suitable nails 19 in anupwardly inclined direction through the joists 20 above the places of attachment to the boot of the wire and to loop the wires over said nails 19 when, by pulling downwardly upon the wire, in which position a great deal of force can be easily applied, it will cause the boot to be surely and snugly drawn into the desired position. It will also be seen that the wire after being employed for drawing the boot into position, can then be twisted upon itself as at 21 to hold many times greater force than the normal use of the structures will ever 1. In combination with hot air boots lengths of wire secured to and extending from diametrically opposite points adjacent thebottoms of said boots.

2. In hot air boots having a pair of par-- allel slots located on their sides adjacent their lower edges, a separate length of wire extended through and from each of said slots.

ALBERT G. SCI-IERER. 

